Miaka

Sorry I unfortunately don’t know what you’re talking about sadly, but I got this list full of secret identities/powers, if you’d like to check it out!
https://www.mangago.zone/home/mangalist/2086091/

Thank youuu dear ╥﹏╥ i will go through your list one by one looking for it (づ￣ ³￣)づ

Don't remember if there was a scene with a maid but this one has FL with hidden powers

https://www.mangago.zone/read-manga/i_was_the_real_owner_of_elheim/

Thank you for the recommendation but unfortunately this is not the one

Is it marriage of convenience ?

I think so.. i couldn’t remember much except for above details.. im sorry if you something in mind, would you mind to share it.. ╥﹏╥

Okay, so first of all this is the link to the story :)
https://www.mangago.zone/read-manga/marriage_of_convenience_scylla_scans/

I also don't remember much of it but I'll try to tell you as much as I know. So this is little different from your description. Fl does regress and in there was a rude maid in the first few chapters. I think she was talking with other maids about how zhe sleeps with the Duke or something and fl hear it and and punish her by hitting her with a stick. But she does not reveal her hidden power in that moment. It comes at last chapters of the story, something about how she has divine power of gods. I don't remember much details on it.

So how the story goes is fl married ml when she was very young. Ml didn't stay at home that much and always went to wars. In the first life time they were distant and didn't talk that much. Fl starts a relationship with a musician when ml is away. at some point ml dies in war and fl was kicked out of the house because no one in the house liked her due to her personality and the way she treated the Duke.

And then she wake up in this life time. To change what happen to her in future she start a business. Something to do with lace and candles carved like angels. Also she tries to have a baby with ml so that she won't get kicked out if she has the future hair.

That all I remember. Hope this is the one you are looking for :)

https://www.mangago.zone/read-manga/boku_no_papa_to_papa_no_hanashi/
https://www.mangago.zone/read-manga/koi_ga_ochitara/
https://www.mangago.zone/read-manga/koi_ga_michitara/
https://www.mangago.zone/read-manga/from_green_kitchen/
https://www.mangago.zone/read-manga/we_re_still_in_the_spring_of_life/
https://www.mangago.zone/read-manga/boku_no_omawarisan/
https://www.mangago.zone/read-manga/kimi_no_yoru_ni_fureru/
https://www.mangago.zone/read-manga/cherry_magic_thirty_years_of_virginity_can_make_you_a_wizard/
https://www.mangago.zone/read-manga/the_last_step_on_the_way/
https://www.mangago.zone/read-manga/sonokoi_jihanki_de_kaemasuka/
https://www.mangago.zone/read-manga/hatsukoi_note/
https://www.mangago.zone/read-manga/my_influencer_boyfriend/
https://www.mangago.zone/read-manga/nagahama_to_be_or_not_to_be/

https://www.mangago.zone/read-manga/max_mojave_s_case/

Thank you all for the recommendations!!!
ヾ(❀╹◡╹)ﾉ~